Source Naturals Chem-Defense is a nutrient blend formulated for persons with chemical sensitivities. Recent scientific research indicates that molybdenum, a trace mineral which activates the enzymes aldehyde oxidase and sulfite oxidase, may deliver necessary nutritional support for chemically sensitive individuals. Glutathione (GSH) is a key element of the liver's detoxifying process, and is also the precursor for glutathione peroxidase, a major free radical-scavenging enzyme. Riboflavin is the precursor for FAD, a coenzyme which recycles used GSH.